This auxilliary speed sensor can be simply omitted, correct? Seeing how my 4L60 truck never came with one, I don't anticipate the PCM would be looking for it would it?
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This auxilliary speed sensor can be simply omitted, correct? Seeing how my 4L60 truck never came with one, I don't anticipate the PCM would be looking for it would it?
The ISS is used by the PCM to run the “Slip Test” diagnostic. If you swapped in a 4L80 segment – the PCM will be “looking” for input from this sensor. You can set the DTCs to “Not Reported” for the ISS and the Slip Test diagnostic - to run without an ISS.
Personally, I would run the ISS and Slip Test diagnostic - it’s a good early warning system when the transmission components are being pushed to the limit (or beyond) - especially when using a power adder.
Regards,
Taz
I'll take a peek at a 4L80 segment to familiarize myself with this, I visualized swapping a segment as copy/pasting the entire transmission "folder" from 1 tune to another, not taking into account the possibility of the "folder" having more sub-folders. That must be where the ISS stuff is. The whole reason for the 4L80 is because I have a Whipple (not yet installed though) and I tow, so the ISS sounds like a pretty good idea now.
What OEM OS are you using ? You copied over the segments for both the Transmission Calibration and Transmission Diagnostics, correct ?
Regards,
Taz
Nope, planning ahead. Will be using a 411 with COS5 (just need plugs and repinning tools) and Express Van base tune. Gonna be a busy summer! I want to swap before the 60 acts up so I can still get some $$$ off of it. I know I need to swap input shafts in the T-case, might need to resize driveshaft, sub'd to this thread so I don't forget how to do the incredibly simple wiring, and of course the segment swap. I don't want any surprises on the day of.
OK … now I understand what you’re doing ….
My comment in post #12 above regarding setting the DTCs to “Not Reported” apply to more recent 4L60 / 4L80 OS.
If you’re going to use a 2001-2002 OS (as the basis for the COS5 upgrade) the ISS DTCs are P0716 and P0717 - these may be set to “Yes / No” values.
The Slip Test parameters are found in E0801 to E0804. These parameters allow you to adjust the TPS and Transmission Temperature values of the Slip Test. By adjusting these values the Slip Test could be disabled, or modified to suit your preferences.
Regards,
Taz
Excellent info, thank you much sir.